CN102076950A - Fuel injector with two-piece armature - Google Patents
Fuel injector with two-piece armature Download PDFInfo
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- CN102076950A CN102076950A CN2009801244886A CN200980124488A CN102076950A CN 102076950 A CN102076950 A CN 102076950A CN 2009801244886 A CN2009801244886 A CN 2009801244886A CN 200980124488 A CN200980124488 A CN 200980124488A CN 102076950 A CN102076950 A CN 102076950A
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- armature
- fuel injector
- control room
- sleeve
- overtravel
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- 239000000446 fuel Substances 0.000 title claims abstract description 67
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 230000008602 contraction Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 12
- 238000007599 discharging Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 241000111040 Micrasema minimum Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0024—Valves characterised by the valve actuating means electrical, e.g. using solenoid in combination with permanent magnet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a fuel injector (110) for injecting fuel into the combustion chamber of an internal combustion engine, especially for use in accumulator injection systems. The fuel injector (110) comprises at least one injection valve member (116) for closing or releasing at least one injection opening, said injection valve member being movably supported in an injector body (114) of the fuel injector (110). The fuel injector (110) also comprises at least one hydraulic valve (146), wherein the hydraulic valve (146) is provided to control a stroke of the injection valve member (116) via at least one control chamber (124). The hydraulic valve (146) comprises a magnetic actuator (148) having at least one magnetic coil (150) and at least one armature (154). The armature (154) comprises at least one armature plate (162), which interacts with the magnetic actuator (148), and at least one armature bolt (164), which is supported so as to be movable relative to the armature plate (162) and which controls a pressure in the control chamber (124).
Description
Prior art
But also can use the ejecting system of stroke control for ejecting system to the control of the explosive motor fueling of explosive motor, especially self ignition both working pressure.The ejecting system that acts as a fuel can use the unit fuel injector unit, and pump-conduit-nozzle unit also is so-called storage formula ejecting system.In storage formula ejecting system (common rail system), fuel injector is provided the fuel that is under the high pressure by high pressure accumulator.Co-rail ejector can make jet pressure adapt to the load and the rotating speed of internal-combustion engine in an advantageous manner.Below the invention particularly relates to common rail fuel injector, but also can be used for the fuel injector of other type in principle.
On the co-rail ejector of routine, use actuator to open fuel injector usually, promptly start course of injection, and follow and close fuel injector.For example can use electromagnetic actuators or piezoelectric actuator here, in then with the present invention who describes, will be referred to use electromagnetic actuators.
In being provided with the fuel injector of hydrovalve of electromagnetic actuators, this class especially to try hard to reach the isostasy of hydrovalve.This means that the power of closing of hydrovalve, to be hydrovalve seal the power of a pressure by it in the control room of fuel injector irrelevant with system pressure or rail pressure.This will so reach, and promptly the sealing function of hydrovalve need not to resist predetermined pressure and applies.Therefore when little stroke, especially can embody big valve cross section.
Use the solenoid valve of this isostasy can reach the obvious improvement of multiple injection aspect.Especially very little solenoid valve stroke-the trip is for example compared approximately little 50%-with the stroke of the fuel injector that uses comparable ball valve will make the stability of the fuel injector of the hydraulic buttery valve that is provided with isostasy obviously improve.
But the spring of the solenoid valve that a problem of this class A fuel A sparger shows as valve when closing.Because this spring typically is limited on 200 to the 250 μ s minimum interval between the switching process.This causes especially like this, promptly when in then injection of control, under the also unclosed situation of spring of armature closure, also can cause the obvious drift of emitted dose by the variation that has reduced the spring characteristic working time when spraying for the second time.But in many cases injection interval, be that space requirement between each switching process of hydrovalve is about 100 μ s.
Summary of the invention
Therefore the present invention proposes a kind of fuel injector that is used for injecting fuel into the firing chamber of internal-combustion engine, and it has avoided the above-mentioned shortcoming of known fuel injector at least to a great extent.This fuel injector especially can be used in the storage formula ejecting system, especially can be used in the internal-combustion engine of self ignition, but also can consider other use occasion.Especially can significantly reduce described armature by the fuel injector that is proposed and close spring, this can cause injection interval less than 200 μ s.The advantage that also can keep the isostasy hydrovalve simultaneously.
Basic design of the present invention is, by the spring that coupling can prevent that armature from closing of taking off of armature bolt and armature card.Can make the advantage of pressure equalisation valve continue to optimize thus, and can realize that especially very little discharge time at interval.The present invention is making and is comprising and can combine with the fuel injector that uses one armature aspect the assembling, so that for example can provide according to the selection as user's request of the fuel injector of use multi-part type armature of the present invention.
Compare the manufacturing of this armature has simplified significantly with traditional armature.By the coupling that takes off of armature bolt and armature card, can carry out the optimization of material dividually in addition.Can use different materials for armature bolt and armature card.For example armature card can be aspect magnetic property and geometrical shape constitutes with being optimised, and the same armature bolt that constitutes can be optimised aspect the closing property of the best and as far as possible little wearing and tearing separatedly.Especially the material of armature card select and geometric configuration aspect needn't take wearing and tearing on the valve seat into account.Not only material but also geometrical shape can reduce for the wearing and tearing of minimum and best sealing characteristics and for the armature bolt.Cancelled in addition and used the necessity of spring stop, because for example can use the adjustment ring of adjusting overtravel with replacing as dimensional chain.
The assembling of the fuel injector that is proposed can use the armature that is configured assembly to carry out.This assembly be for example as below describing in detail, can comprise that an armature card, armature sleeve, one adjust ring, sickleshaped dish especially.This assembly for example can carry out beyond fuel injector is really assembled a little and offer real fuel injector assembling point as the assembly that assembles in advance.
In order to transform the design of the invention described above, this fuel injector comprises injection valve member at least one injector body that is bearing in fuel injector movably, that be used to cut out or discharge at least one spray-hole.This injection valve member can be configured single-piece or many s'.
The fuel injector that is proposed also comprises at least one hydrovalve in addition, and this hydrovalve is provided to control the lifting of spraying valve member by at least one control room.Here as described above, this hydrovalve is configured pressure equalisation valve, is configured a kind of valve in other words, even also do not have the fuel high pressure effect in off position on this valve, does not promptly for example have the rail pressure effect.This for example can realize like this, and promptly this hydrovalve does not have the fuel fluid pressure surface on the direction of opening or closing that acts on hydrovalve, for example not with drain hole wait to close the remain silent face of vertical orientation or the component of face.
This hydrovalve has at least one electromagnetic actuators that comprises at least one electromagnetic coil and at least one armature.Armature itself then comprises the interactional armature card of at least one and electromagnetic actuators and at least one relative armature card armature bolt that support movingly and that control pressure in the control room.This armature bolt especially is provided to: correspondingly discharge with the control of electromagnetic actuators or at least one of closing control chamber discharged restriction.Therefore can be regarded as a closure member of arbitrary configuration basically for the armature bolt, it for example can be configured the longitudinal extension parts with any cross section, for example configuration of a solid tightening latch.And also can have hollow cross section, this will describe in detail with the example of a preferred sleeve configuration below.
The armature bolt especially can be by a valve spring spare, for example the valve spring of a spiral form is applied in first power that acts on the closing direction.Armature card itself especially can be by at least one armature spring spare, for example the armature spring of a spiral form is applied in second power against the closing direction effect.Wherein second power is preferably less than first power.
The armature bolt for example can be bearing in the inside of armature card or surround armature card, so that armature bolt and armature card can reciprocally relatively move on closing direction.Preferably relatively armature card supporting in this wise of armature bolt in the case makes the motion of armature card driving the armature bolt from certain minimum stroke at least against opening on the direction of closing direction, so that hydrovalve is opened.This for example can take device by corresponding shoulder on armature bolt and/or the armature card and/or other and realize.
The armature bolt especially can constitute form of sleeve and comprise an armature sleeve thus or constitute the armature sleeve.Here the armature sleeve preferably is bearing on the armature card, especially in armature card in the axial direction slidably.The sleeve configuration of the armature form of sleeve of armature bolt is particularly advantageous in the configuration of isostasy hydrovalve, according to above definition, because can use the armature sleeve to provide against fuel fluid pressure surface as far as possible little on the closing direction.Whole hydraulic couplings on the armature sleeve then can act on diametrically, and can not influence the armature sleeve in the axial direction the position or on this armature sleeve, apply hydraulic coupling.
When using the armature sleeve, just can in the armature sleeve, receive a press-on pins that is used for the hydraulic seal in space in the armature sleeve.The interior space of armature sleeve can be configured cylindricality, especially is configured circular cylinder and/or polygonal cylinder.The external diameter of press-on pins can adapt to the internal diameter or the Inner Dimension in space in this, so that press-on pins for example reaches in the interior space that is bearing in the armature sleeve hermetically slidably.Press-on pins, armature sleeve and be provided with the valve piece of discharging restriction and can limit a valve chamber, wherein hydraulic coupling only acts on the press-on pins in the inside of this valve chamber by the high pressure of fuel, and does not act on the armature sleeve.Can produce isostasy equally in this way.
Equally preferably, fuel injector comprises a valve piece under the situation of using the armature sleeve, receives at least one discharge restriction in control room in this valve piece.Here can be regarded as a hole usually for discharging restriction towards the control room, it when hydrovalve is opened, limit or controls fuel by the control room to low pressure current drainage current drainage partly.
Particularly preferably be in the case, the valve piece has the projection that extend at least in the armature sleeve, especially a columniform projection in the hydraulic valve closes state.Its cross section of this projection is the internal diameter in space in the adaptive armature sleeve in section ground at least, promptly for example at least section ground have the cross section of a circle, a polygonal cross section etc.This projection of valve piece can wherein preferably guarantee the guiding of sealing simultaneously as the guiding of armature sleeve in this way.
In this projection, especially can receive an outlet of the discharge restriction in control room.This outlet for example can be disposed on the end of carrying the control room of this projection.Conversion ground or additionally, at least one outlet also can be received in the contraction flow region of a circumference of this projection.Therefore should projection at first have one first guide section, secondly described contraction flow region has at least one outlet, and then is another guide section.Its external diameter of at least one guide section preferably adapts to the internal diameter in space in the armature sleeve in the case, promptly for example also has described circle and/or polygonal cross section.
Other preferred implementing form of the present invention relates to the stroke of hydrovalve and the configuration of distance adjustment possibility.Therefore particularly preferably be, the armature bolt is being carried on the side in control room at least in part by a removable adjustment disk, especially sickleshaped dish encirclement.Can use that this adjustment disk-it for example can be provided-regulate the overtravel of hydrovalve with different thickness.Here be illustrated in electromagnetic actuators for overtravel and close the segment distance have no progeny, after reaching its seat and go up and reach its closed position thus with convenient armature bolt, armature card continues motion again based on its inertia.
On a side in control room, corresponding overtravel backstop can be set also what oppose, especially an adjustable overtravel backstop.And this overtravel backstop also can be set to removable overtravel backstop, also is the form of a removable dish or ring.This overtravel backstop can be set at any parts of fuel injector basically, especially between injector body and the armature card.But particularly preferably be, armature card has a guiding continuation on it carries a side of electromagnetic actuators, columniform guiding continuation for example, and wherein, fuel injector has a guide portion that is used to receive this guiding continuation.In that guide portion-it for example can be the constituent element of valve piece, receive therein the above-mentioned discharge restriction in control room-and the guiding continuation between can be provided with at least one overtravel backstop.For example can between guide portion and guiding continuation, receive the overtravel backstop of a removable disk-form as described above.
Description of drawings
Express embodiments of the invention and in the following description it being described in detail in the accompanying drawings.
Accompanying drawing is represented:
Fig. 1: according to first embodiment's of a fuel injector of the present invention sectional view;
Fig. 2: according to a plan view of the embodiment's of Fig. 1 armature card; And
Fig. 3: according to the sectional view of second embodiment's of a fuel injector of the present invention section.
Embodiment
Express partial view according to first embodiment of fuel injector 110 of the present invention with sectional drawing among Fig. 1, its direction of dissecting is parallel to sparger axis 112.Fuel injector 110 comprises an injector body 114, and this injector body is only represented in the annex mode in Fig. 1.Guiding ground is supporting an injection valve member 116 in the axial direction in injector body 114, only expresses a valve piston 118 for this injection valve member in the view according to the section form of Fig. 1.But these injection valve member 116 single-pieces or multi-part type constitute and are used to open and close at least one spray-hole, and this spray-hole is not shown in Fig. 1.
Its upper end of valve piston 118 usefulness is bearing in the sleeve shape projection 120 of a valve piece 122, thus between the upside of valve piston 118 and valve piece 122 control room 124 of formation.This control room can be applied in the fuel that is in high pressure under by an input restriction, so that the pressure in the control room 124 is with the position of control valve piston 118 and the position of control injection valve member 116 thus.
Valve piece 122 also has one and constitutes columniform valve block 128 at least in part, this valve block down, promptly towards the closing direction that sprays valve member 116 be supported on the injector body 114.On this valve block 128, at first be provided with the sealing shoulder 130 of a taper, and then on sealing shoulder 130, be provided with a cylindrical protrusions 132 of valve block 128.
Discharge restriction 134 for be provided with control room 124 in valve piece 122 one, set out by control room 124, at first following an axial bore 136, then following is throttle orifice 138 two, that relative sparger axis 112 extends obliquely in this embodiment.In these throttle orifice 138 each feeding outlets 140, these outlets are set in the circumference contraction flow region 142 of projection 132.Above contraction flow region 142, projection 132 is extended again and have a guide section 144.
For opening or closing of the outlet 140 of discharging restriction 134, in Fuelinjection nozzle 110, be provided with a hydrovalve 146, it is configured solenoid valve.Hydrovalve 146 comprises the electromagnetic actuators 148 with an electromagnetic coil 150 and a magnetic core 152, and this coil and core axis are to arranging symmetrically.
Armature card 162 has an axially armature disc 166 of the disc format of symmetry at it on the end of magnetic core 152.In the guiding continuation 168 that on this armature disc 166, is connecting a cylindrical sleeves form on the closing direction.Armature card 162 cooperatively interacts with electromagnetic coil 150 and correspondingly can be made by a material for electromagnetic actuators optimization therewith.
In this pilot sleeve 168, guide to supporting armature bolt 164 in this embodiment.This armature bolt 164 has an armature sleeve 170 in the embodiment shown.This armature sleeve 170 comprises a columniform interior space 172, and guiding reaches the guide section 144 that is supporting projection 132 hermetically in the space in this.
Armature sleeve 170 has a sealing the margin 174 on its lower end, the sealing edge is seated on the sealing shoulder 130 of valve piece 122 and constitutes one and is sealed and matched in the closed condition of the hydrovalve shown in Fig. 1 146.In the closed condition shown in Fig. 1, closed the discharge restriction in this way, so that high pressure in control room 124, occurred and will spray valve member 116 being pressed onto it in Fig. 1 on the unshowned valve seat and close at least one spray-hole by armature sleeve 170.
Here the hydrovalve shown in Fig. 1 146 is configured pressure equalisation valve, because on the hydrovalve 146, especially on armature bolt 164, and in the axial direction can not the effect hydraulic coupling.Only act on diametrically on the inwall of armature sleeve 170 by the pressure that discharge restriction 134 is delivered in the contraction flow region 142 by control room 124.
Armature bolt 164 has an adjustment disk 176 at an upper portion thereof on the end of magnetic core 152, this adjustment disk is inserted in the circumferential groove of armature sleeve 170.This adjustment disk 176 for example is configured the sickleshaped dish in an illustrated embodiment, as appreciable by the plan view of armature among Fig. 2 154.Residual air dividing disc 184 not shown in this Figure.As appreciable among Fig. 1, armature sleeve 170 has a shoulder 180 in its lower end, and these shoulder restriction armature card 162 downward motions reach the effect of playing overtravel backstop 182 thus.For armature 154 is installed, at first can with armature sleeve 170 from following immigration pilot sleeve 168, then in the top the sickleshaped dish be inserted in the groove of armature sleeve 170.Here valve spring 158 is supported on the sickleshaped dish 178 in an illustrated embodiment, but be supported on the other parts of armature bolt 164 also convertiblely, as on the armature sleeve 170.
Its upper end of armature spring 160 usefulness is supported on the armature disc 166.But also can be other supporting form.The sliding bearing of armature sleeve 170 in armature card 162 allows the relative movement between armature card 162 and the armature bolt 164, and this relative movement is upwards limited by sickleshaped dish 178 and limited by shoulder 180 downwards.Also be provided with the residual air dividing disc 184 of one or more disc format on the upper surface of this external armature disc 166, this residual air dividing disc can be adjusted the gap between armature 152 and the magnetic core 154.For the ground of the adjustment conversion by residual air dividing disc 184 or additionally, the residual gap between magnetic core 152 and the armature 154 also can be configured air gap.For example also available other form that is different from the use dish is provided for a backstop of the armature sleeve 170 of armature bolt 164 or armature bolt 164.
If hydrovalve 146 is operated, then on electromagnetic actuators 148 magnetic force appears.Armature card 162 is up attracted by electromagnetic coil 152 in Fig. 1.The sickleshaped dish 178 that connects with armature bolt 164 shapes works to take device and is used to make armature sleeve 170 upwards to be attracted by armature card 162 drives sealedly.Sealing the margin 174 is lifted, so that can leak in the low pressure current drainage part and the injection valve member among Fig. 1 can move upward by discharging restriction 134, so that discharge spray-hole from its seat on sealing shoulder 130 from the pressure in control room 124.To spray valve member 116 and fuel injector 110 cuts out again in order to make, will turn-off electromagnetic actuators 148 or magnetic force is reduced, be pressed onto its seat again and go up to reach and in control room 124, can rebulid high pressure so that drive armature bolts 164 by valve spring 158.Spraying valve member 116 then will close again.
Residual air dividing disc 184 especially can be clamped in sickleshaped dish 178 below so that residual air dividing disc 184 can remain in the definite position or is brought in the position of determining like this by sickleshaped dish 178.Here the spring force of armature spring 160 should be selected as much as possible little, preferably its maximum value is 3 to 4 newton.When electromagnetic actuators 148 is turned off or after its magnetic force regulated downwards, valve spring 158 was pressed onto armature bolt 164 on its seat as described above.In case armature bolt 164 reaches on its seat, armature card 162 continues to move downward owing to its inertia.The trip is also referred to as overtravel and indicates with a in Fig. 1.In Fig. 1, also defined other parameter x (thickness of sickleshaped dish 178), z (axial length of armature card 162) and y (distance between the downside of the top edge of sickleshaped dish 178 and armature card 162).Therefore have: the thickness x of sickleshaped dish 178 can be by parameter a, and y and z passing through type x=a-y+z calculate.
Overtravel a will limit by overtravel backstop 182, and the latter constitutes by the shoulder on ring 186 upsides of armature sleeve 170 180 in this embodiment.Overtravel a preferably should be not more than 10 μ m.If the tolerance of the accessory size relevant with overtravel a need then exist by one and adjust the possibility that ring (packet size) is adjusted overtravel a greater than the tolerance of overtravel under individual cases.The size that must be indicated by y and z in the survey plan 1 before assembling reaches and selects a corresponding adjustment disk 176 (size x among Fig. 1) then in the case.
Expression is according to second embodiment of fuel injector 110 of the present invention among Fig. 3.The structure of this fuel injector 110 and working method be mainly to a great extent corresponding to structure and working method according to the embodiment of Fig. 1, so that can be as best one can with reference to above description.Fuel injector 110 also comprises an injector body 114 in addition, is supporting an injection valve member 116 that has valve piston 118 therein.On valve piston 118 in valve piece 122 also structure a control room 124 is arranged, this control room loads high pressure by an input restriction 126.Also can reducing pressure by the discharge restriction 134 in the valve piece 122 in control room 124, wherein in the embodiment shown in fig. 3, discharges restriction 134 and differently only comprise an axial bore 136 with embodiment according to Fig. 1.This axial bore 136 feeds in the inner cavity of guide portion 188 of a cylindrical sleeves shape of valve pieces 122 and can close or discharge by hydrovalve 146.
Armature bolt 164 reaches in the cylindrical cavity that is bearing in armature card 162 in the axial direction movingly hermetically.Armature sleeve 170 also is configured tubular shape and has matched edges 192, joggle edges for example on its lower end, plane seat or an awl seat, it is seated on the sealing seat 194 in the guide portion 188 of valve piece 122 in closed condition shown in Fig. 3 and seals up the outlet 140 of discharge restriction 134.
Received a columniform press-on pins 196 in the embodiment shown in fig. 3 in the inside of tubulose armature sleeve 170.This cylindrical pressure pin be supported on the magnetic core 152 with its upper end or another parts of electromagnetic actuators 148 on.Corresponding to the internal diameter of tubulose armature sleeve 170, so that armature sleeve 170 is bearing on this press-on pins 196 press-on pins 196 slidably on its external diameter, but press-on pins 196 can guarantee control room 124 wiper seals ground sealing.Pressure-this pressure by liquid in the control room 124 is delivered on the press-on pins 196 by discharging restriction 134-and press-on pins 196 upwards is pressed on the magnetic core 152.
Armature bolt 164 is carried the device of taking that also has a ring form on the upper end portion in control room 124 at it.But this ring for example also can be configured adjustment disk 176 or sickleshaped dish 178 and for example also be connected with armature sleeve 170 to force closure.Conversion ground or additionally this ring also can otherwise constitute, for example be made to the constituent element of armature sleeve 170 itself.A residual air dividing disc 184 also can be set below sickleshaped dish 184.
According to the working method of fuel injector embodiment illustrated in fig. 3 110 to a great extent corresponding to working method according to the embodiment of Fig. 1.Employed hydrovalve 146 also relates to pressure equalisation valve because in the axial direction without any action of hydraulic force on armature 154.In case electromagnetic valve actuator 148 is energized, armature card 162 will be attracted by electromagnetic coil 150 and move upward.Ring by sickleshaped dish 178 forms on the armature bolt 164 also makes armature bolt 164 upwards be attracted with armature card 162.The clamping of residual air dividing disc 184 also is used to make it to remain on a definite position.
Armature card 162 is by 188 guiding of the guide portion on guiding continuation 168 when described moving upward.By armature spring 160 armature card 162 is positioned on the definite position.The spring force of armature spring 160 also should selectedly get as much as possible little, for example also is maximum 3 to 4 newton.By the moving upward release outlet 140 and make control room 124 decompressions of armature bolt 164, so that spray valve member 116 and can move upward and can discharge at least one spray-hole.
For the end injection process, can turn-off electromagnetic actuators 148 or be transformed on the little electric current.Valve spring 158 is pressed onto armature bolt 164 again on its seat thus.In case the armature bolt reaches on its seat, outlet promptly is closed, and control room 124 loads high pressure by input restriction 126 again, moves downward and close at least one spray-hole again so that spray valve member 116.
In case armature bolt 164 reaches on its seat, armature card 162 still moves downward based on its inertia, so that forms an overtravel a again.
This overtravel a limits by overtravel backstop 182.Overtravel backstop 182 is made of the top edge of guide portion 188 in the embodiment shown.But also selectively between a shoulder 198 of narrowed portion 190 ends of the guiding continuation 168 of guide portion 188 and armature card 162, an overtravel backstop 182 of adjusting ring 200 forms is set, as shown in Figure 3.This adjustment ring 200 especially can be configured removable adjustment ring, so that overtravel backstop 182 can be made to removable overtravel backstop 182.Also can consider the overtravel backstop 182 of other configuration, for example its mode is, shoulder 180 is not to be formed on the guiding continuation 168 of armature card 162, but for example is formed on the guide portion 188.And can consider the combination of overtravel backstop or this class overtravel backstop of other type.Always overtravel a is not more than 10 μ m.Minimum overtravel a drifts about by greatest wear in the valve seat or the armature travel that forms thus and limits.These wearing and tearing or armature travel drift are typically approximately less than 4 μ m, and the lower limit of overtravel a is about 5 μ m thus.
This preferred tolerance can be described based on top embodiment according to Fig. 1.The tolerance of wherein relevant with overtravel a accessory size can be greater than the overtravel that requires under individual cases, therefore have such possibility, promptly by an additional adjustment ring, for example adjust ring 182,200 and adjust.The size that must be indicated by y and z in the survey plan 3 before assembling can correspondingly select to adjust ring 200 with size x thus in the case.
Claims (12)
1. be used for injecting fuel into the fuel injector (110) of the firing chamber of internal-combustion engine, especially use in storage formula ejecting system, this fuel injector comprises that at least one is bearing in the injector body of this fuel injector (110) (114) movingly, be used to close or discharge the injection valve member (116) of at least one spray-hole, also comprise at least one hydrovalve (146), wherein, this hydrovalve (146) is provided to control by at least one control room (124) stroke of described injection valve member (116), wherein, described hydrovalve (146) comprises the electromagnetic actuators (148) with at least one electromagnetic coil (150) and at least one armature (154), wherein, described armature (154) comprises that at least one supports movingly with the coefficient armature card of described electromagnetic actuators (148) (162) and at least one relative described armature card (162) and controls the armature bolt (164) of pressure in the described control room (124).
2. according to the fuel injector (110) of a last claim, wherein, described armature bolt (164) is applied in first power that acts on the closing direction by a valve spring spare (158), wherein, described armature card (162) is applied in second power against the closing direction effect by an armature spring spare (160), wherein, described second power is less than described first power.
3. according to each fuel injector (110) in the above claim, wherein, described armature bolt (164) comprises an armature sleeve (170), and wherein, described armature sleeve (170) is bearing on the described armature card (162), especially in described armature card (162) in the axial direction slidably.
4. according to the fuel injector (110) of a last claim, wherein, in described armature sleeve (170), received one that be supported slidably, be used for the press-on pins (196) that described armature sleeve (170) is being carried the hydraulic seal on the side in described control room (124).
5. according to each fuel injector (110) in last two claims, also comprise a valve piece (122), wherein, described valve piece (122) comprises that one of described control room (124) is discharged restriction (134), wherein, described valve piece (122) have one extend into projection (132) in the described armature sleeve (170), especially one at least section ground be columniform projection (132).
6. according to the fuel injector (110) of a last claim, wherein, in described projection (132), receive an outlet (140) of described discharge restriction (134).
7. according to the fuel injector (110) of a last claim, wherein, described outlet (140) is received in the contraction flow region (142) of a circumference of described projection (132).
8. according to the fuel injector (110) of a last claim, wherein, described projection (132) comprises a guide section (144) on a side of carrying described control room (124) of described contraction flow region (142), wherein, the external diameter of described guide section (144) adapts to the internal diameter of described armature sleeve (170).
9. according to each fuel injector (110) in the above claim, wherein, described armature bolt (164) on a side of carrying described control room (124) at least in part by a removable adjustment disk (176), especially a sickleshaped dish (178) surrounds, so that can regulate the overtravel of described hydrovalve (146).
10. according to each fuel injector (110) in the above claim, wherein, on a side of carrying described electromagnetic actuators (148) of described armature card (162), be provided with an overtravel backstop (182), especially a removable overtravel backstop (182) is used to limit the overtravel of described hydrovalve (146).
11. fuel injector (110) according to a last claim, wherein, described armature card (162) has a guiding continuation (168) on it carries a side of described electromagnetic actuators (148), wherein, described fuel injector (110) has a guide portion (188) that is used to receive described guiding continuation (168), wherein, between described guide portion (188) and described guiding continuation (168), be provided with at least one overtravel backstop (182).
12. according to the fuel injector (110) of a last claim, wherein, described guide portion (188) is configured the part of a valve piece (122), wherein, described valve piece (122) comprises at least one discharge restriction (134) in described control room (124).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008002717.0 | 2008-06-27 | ||
| DE200810002717 DE102008002717A1 (en) | 2008-06-27 | 2008-06-27 | Fuel injector with two-part magnet armature |
| PCT/EP2009/055019 WO2009156208A1 (en) | 2008-06-27 | 2009-04-27 | Fuel injector with two-piece armature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102076950A true CN102076950A (en) | 2011-05-25 |
Family
ID=40825267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801244886A Pending CN102076950A (en) | 2008-06-27 | 2009-04-27 | Fuel injector with two-piece armature |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2307697B1 (en) |
| CN (1) | CN102076950A (en) |
| DE (1) | DE102008002717A1 (en) |
| RU (1) | RU2517518C2 (en) |
| WO (1) | WO2009156208A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014740A (en) * | 2016-07-25 | 2016-10-12 | 成都威特电喷有限责任公司 | Control valve for eliminating axial force of valve rod |
| CN106050499A (en) * | 2016-05-31 | 2016-10-26 | 清华大学 | Electric control high-pressure oil sprayer with control valve with self-locking function |
| CN106837640A (en) * | 2017-01-25 | 2017-06-13 | 中国第汽车股份有限公司 | The controllable common-rail injector of needle valve movement speed |
| CN107835896A (en) * | 2015-07-14 | 2018-03-23 | 罗伯特·博世有限公司 | Switching valve and fuel injector for fuel injector |
| CN109863293A (en) * | 2016-10-12 | 2019-06-07 | 世倍特集团有限责任公司 | The operation of fuel injector with hydraulic backstop |
| CN110573261A (en) * | 2017-04-10 | 2019-12-13 | 天幸星科技有限公司 | fuel atomizer and method for atomizing fuel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010030393A1 (en) | 2010-06-23 | 2011-12-29 | Robert Bosch Gmbh | Anchor element for magnet component of fuel injection valve of storage injection system to inject fuel into combustion chamber of internal combustion engine, has anchor plate comprising recesses that are limited by opposite edge surface |
| DE102014225323A1 (en) * | 2014-12-09 | 2016-06-09 | Robert Bosch Gmbh | Shift or pressure control valve for a fuel injection system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190698A (en) * | 1996-12-23 | 1998-08-19 | 艾拉西斯·西斯特玛·里瑟卡·菲亚特·耐尔·麦兹奥吉奥尔 | Perfected electromagnetic metering valve for fuel injector |
| US6279873B1 (en) * | 1998-04-11 | 2001-08-28 | Robert Bosch Gmbh | Fuel injection valve |
| DE102006050042A1 (en) * | 2006-10-24 | 2008-04-30 | Robert Bosch Gmbh | Injector, particularly common rail injector, for fuel injection in combustion chambers of internal-combustion engines, has actuator arranged in injector body, which is arranged to operate valve case of control valve |
| JP2008517212A (en) * | 2004-10-20 | 2008-05-22 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Magnet valve operated fuel injector with hydraulic excess stroke stopper |
| WO2008068084A2 (en) * | 2006-12-08 | 2008-06-12 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2029129C1 (en) * | 1989-05-10 | 1995-02-20 | Семенов Владимир Григорьевич | Controlled nozzle for internal combustion engine |
| RU2136949C1 (en) * | 1998-02-16 | 1999-09-10 | Коростышевский Исаак Матвеевич | Electromagnetic fuel nozzle |
-
2008
- 2008-06-27 DE DE200810002717 patent/DE102008002717A1/en not_active Withdrawn
-
2009
- 2009-04-27 WO PCT/EP2009/055019 patent/WO2009156208A1/en active Application Filing
- 2009-04-27 RU RU2011102820/06A patent/RU2517518C2/en active
- 2009-04-27 EP EP09769057A patent/EP2307697B1/en active Active
- 2009-04-27 CN CN2009801244886A patent/CN102076950A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190698A (en) * | 1996-12-23 | 1998-08-19 | 艾拉西斯·西斯特玛·里瑟卡·菲亚特·耐尔·麦兹奥吉奥尔 | Perfected electromagnetic metering valve for fuel injector |
| US6279873B1 (en) * | 1998-04-11 | 2001-08-28 | Robert Bosch Gmbh | Fuel injection valve |
| JP2008517212A (en) * | 2004-10-20 | 2008-05-22 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Magnet valve operated fuel injector with hydraulic excess stroke stopper |
| DE102006050042A1 (en) * | 2006-10-24 | 2008-04-30 | Robert Bosch Gmbh | Injector, particularly common rail injector, for fuel injection in combustion chambers of internal-combustion engines, has actuator arranged in injector body, which is arranged to operate valve case of control valve |
| WO2008068084A2 (en) * | 2006-12-08 | 2008-06-12 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107835896A (en) * | 2015-07-14 | 2018-03-23 | 罗伯特·博世有限公司 | Switching valve and fuel injector for fuel injector |
| CN106050499A (en) * | 2016-05-31 | 2016-10-26 | 清华大学 | Electric control high-pressure oil sprayer with control valve with self-locking function |
| CN106014740A (en) * | 2016-07-25 | 2016-10-12 | 成都威特电喷有限责任公司 | Control valve for eliminating axial force of valve rod |
| CN109863293A (en) * | 2016-10-12 | 2019-06-07 | 世倍特集团有限责任公司 | The operation of fuel injector with hydraulic backstop |
| US11168634B2 (en) | 2016-10-12 | 2021-11-09 | Vitesco Technologies GmbH | Operation of a fuel injector with hydraulic stopping |
| CN106837640A (en) * | 2017-01-25 | 2017-06-13 | 中国第汽车股份有限公司 | The controllable common-rail injector of needle valve movement speed |
| CN106837640B (en) * | 2017-01-25 | 2019-04-26 | 中国第一汽车股份有限公司 | The controllable common-rail injector of needle valve movement speed |
| CN110573261A (en) * | 2017-04-10 | 2019-12-13 | 天幸星科技有限公司 | fuel atomizer and method for atomizing fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2307697A1 (en) | 2011-04-13 |
| RU2517518C2 (en) | 2014-05-27 |
| EP2307697B1 (en) | 2012-06-20 |
| RU2011102820A (en) | 2012-08-10 |
| DE102008002717A1 (en) | 2010-01-14 |
| WO2009156208A1 (en) | 2009-12-30 |
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Application publication date: 20110525 |